JPH0564397U - Safety device for shutter - Google Patents

Abstract

(57) [Summary] [Purpose] To prevent motor damage during safe operation. [Structure] Counting the number of times an obstacle is detected (122),
When an obstacle is detected, the shutter curtain is temporarily stopped, raised to the upper limit position, and stopped for a certain period of time (1
36) and then descend (138). When the number of times the obstacle is detected reaches a predetermined value C0 (134), the shutter curtain is stopped at the upper limit position (144) and an abnormality signal is output (146). When the obstacle is not removed, the number of times of descending and ascending becomes the predetermined value C0, so that damage to the motor can be prevented. Further, when the obstacle is not removed, the shutter curtain is stopped at the upper limit position so that a person can enter and leave and the obstacle can be easily removed.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to a safety device for a shutter, and more particularly, to a safety device for a shutter for safely performing a closing operation of a shutter curtain during unmanned automatic closing of an electric shutter and remote operation.

[0002]

[Prior Art]

 A safety control device has been proposed that makes unmanned control of an electric shutter and remote operation safer and enables centralized control of the electric shutter (Japanese Patent Laid-Open No. 51-46737). With this safety control device, when the shutter curtain comes into contact with an obstacle (body), the shutter curtain is temporarily stopped, then raised to a certain height and stopped again, and then the shutter curtain is lowered again to remove the obstacle. The above ascending / descending operation is repeated until it is removed.

However, in the above-described conventional safety control device, since the raising / lowering operation is repeated until the obstacle is removed, the temperature of the shutter driving motor rises due to the continuous operation of the shutter driving motor (switch), and the shutter driving motor is driven. There was a problem of damaging the motor.

[0004]

[Problems to be solved by the device]

 The present invention has been made to solve the above-mentioned problems, and ensures safety during unmanned automatic closing of an electric shutter and remote operation, and may damage the shutter drive motor. The purpose is to provide a safety device for a shutter that does not have a shutter.

[0005]

[Means for Solving the Problems]

 In order to achieve the above object, the invention of claim 1 counts the number of times that the obstacle detecting means detects an obstacle which is an obstacle to the descending shutter curtain and the number of times the obstacle detecting means detects the obstacle. When the counting means and the obstacle detection means detect an obstacle, the shutter curtain is raised to the upper limit position and then lowered, and when the number of times the obstacle is detected reaches a predetermined value, the shutter curtain is set to the upper limit position. The control means for stopping is included.

Further, the invention of claim 2 counts the number of times that the obstacle detecting means detects an obstacle which is an obstacle to the descending shutter curtain and the number of times the obstacle detecting means detects the obstacle. Counting means, counting means for counting the elapsed time from the start of the first descent, and when the obstacle detection means detects an obstacle, the shutter curtain is raised to the upper limit position and then lowered to detect the obstacle. When the number of times reaches a predetermined value, the shutter curtain is stopped at the upper limit position, and when the obstacle detection means detects an obstacle, the shutter curtain is raised to the upper limit position and then lowered, and the first lowering. It also includes control means for selecting and executing time control for stopping the shutter curtain at the upper limit position when the elapsed time from the start reaches a predetermined time or more. Of.

[0007]

[Action]

 The obstacle detecting means according to the first aspect of the present invention detects an obstacle that interferes with the descending shutter curtain. The counting means counts the number of times the obstacle detecting means detects an obstacle. Then, the control means raises the shutter curtain to the upper limit position and then lowers it when the obstacle detecting means detects the obstacle. Further, the control means stops the shutter curtain at the upper limit position when the number of times of detection of the obstacle counted by the counting means reaches a predetermined value. If the obstacle is not removed, the lowering and raising operations of the shutter curtain are repeated, but in the invention of claim 1, when the number of repetitions reaches a predetermined value, the shutter curtain is stopped at the upper limit position. As described above, according to the first aspect of the present invention, the number of repetitions of the descending and ascending operations of the shutter curtain is limited to a predetermined value when the obstacle is not removed. Therefore, the shutter drive motor is driven continuously by the shutter drive motor. The motor temperature will not rise and this will prevent damage to the shutter drive motor. Further, if the obstacle is not removed, the shutter curtain is stopped at the upper limit position, which makes it easier for people to enter and exit in an emergency, and at the same time removes the obstacle.

The counting means of the invention of claim 2 counts the elapsed time from the start of the first descent. The control means controls the number of times described in claim 1, and when the obstacle detection means detects an obstacle, raises the shutter curtain to the upper limit position and then lowers the shutter curtain, and a predetermined elapsed time from the start of the first descent. Select and execute the time control to stop the shutter curtain at the upper limit when the time is exceeded. When the number of times control is selected, the control means controls as described in claim 1, and when the time control is selected, the shutter curtain is raised to the upper limit position when the obstacle detection means detects an obstacle. The shutter curtain is lowered at a later time, and the shutter curtain is stopped at the upper limit position when the elapsed time from the start of the first descent becomes a predetermined time or more. As described above, according to the time control of the invention of claim 2, since the descending and ascending operations of the shutter curtain are restricted within a predetermined time when the obstacle is not removed, the shutter drive motor is continuously operated to operate the shutter. The drive motor temperature does not rise, which prevents damage to the shutter drive motor.

[0009]

【Example】

 An embodiment of the present invention will be described below with reference to the drawings.

FIG. 1 shows an electric shutter provided with the safety device of this embodiment. The shutter curtain 12 is configured to move up and down with its both ends being guided by guide rails 18 having a substantially U-shaped cross section that is stretched from the lintel 14 to the floor surface 16. The upper end of the shutter curtain 12 is attached to the winding shaft 20. When the winding shaft 20 is rotated by a motor (opening / closing machine) 22 via a chain 24, the shutter curtain 12 is wound up or pulled out, and the shutter curtain 12 is moved up and down.

A control device 34 is disposed above the lintel portion 14. The control device 34 includes a microcomputer including a ROM, a RAM, a CPU and the like. The controller 22 is connected to the motor 22 and an operating unit 38 via a signal line 36. The operation device 38 is provided with operation switches 40, 42 and 44 for manually raising (opening), lowering (closing) and stopping the shutter curtain 12.

An upper limit switch (LS) 46 for detecting the upper limit position (fully open position) of the shutter curtain 12 and a lower limit switch 48 for detecting the lower limit position (fully closed position) are provided near the motor 22. The position detection unit 32 is attached. The position detection unit 32 is rotated by the rotational force of the motor 22 transmitted through a gear 33 and is rotated by a shaft having a male screw, and the shaft is screwed into the male screw of the shaft to rotate the shaft in the axial direction of the shaft. And a moving block that moves to a position where the limit switches 46 and 48 are attached to both ends of the moving range of the moving block. Therefore, if the moving range of the moving block and the moving range of the shutter curtain 12 are associated with each other, the fully open and fully closed positions of the shutter curtain 12, that is, the upper and lower limit positions can be detected. The upper and lower limit switches 46 and 48 are connected to the control device 34.

At the lower end of the shutter curtain 12, there is provided a transmitter including a seat switch 26 that is turned on when an obstacle or the like comes into contact, and a light emitting unit 28 that emits infrared rays when the seat switch 26 is turned on. And 30 are attached. Further, a light receiving portion 50 for receiving the infrared rays emitted from the light emitting portion 28 is attached to the lintel portion, and this light receiving portion 50 is connected to the control device 34. It should be noted that the signal may be transmitted by sound waves such as radio waves and ultrasonic waves instead of infrared rays.

Further, the control circuit 34 includes the type of safety control mode, the shutter curtain stop time at the upper limit position, the number of times the shutter curtain descends and rises when an obstacle is detected, and the repeating time of descending and ascending. The setting device 10 for setting is connected. The control circuit 34 is connected to the central control unit of the central control room so that a control signal from the central control unit of the central control room existing at a remote place can be input and an abnormal signal can be output to the central control unit. ing.

Next, the control routine of this embodiment by the control device 34 will be described with reference to FIGS. In step 100, it is determined whether or not a shutter curtain descending signal is input from the central control device. If it is not the down signal, that is, if it is the up signal or the stop signal, the shutter curtain is controlled according to these signals in step 102. That is, in the case of the rising signal, the shutter curtain is raised, and when the upper limit switch 46 is turned on, the shutter curtain is automatically stopped. If a stop signal is input while the shutter curtain is moving up or down, the shutter curtain will be stopped immediately.

When it is determined in step 100 that the descending signal is input, the shutter curtain is lowered in step 104, and it is determined in step 106 whether or not an obstacle is detected by the seat plate switch 26. The timer is started when the vehicle passes the step 104 for the first time. If no obstacle is detected, it is determined in step 108 whether the lower limit switch 48 is turned on and in step 110 whether the seat plate switch 26 is turned on. When the seat plate switch 26 is turned on after the lower limit switch 48 is turned on, it is determined that the lower end of the shutter curtain 12 has reached the floor surface 16 and the operation of the shutter curtain is stopped in step 112, and the obstacle is stopped in step 114. The count value C that counts the number of detections is reset and the timer that determines the repeat operation time is reset. When it is determined in step 110 that the seat plate switch 26 is not turned on, it is determined that the battery of the transmitter 30 has run out and an abnormal signal is output to the centralized control device in step 146. In the next step 148, it is judged whether or not the restoration signal is input. When the restoration signal is input, the signal is restored in step 150.

When it is determined in step 106 that the obstacle is detected by the seat plate switch 26, it is determined in step 116 whether the safety control mode set by the setting device 10 is the number control mode. Then, in the number-of-times control mode, the number-of-times control described below is executed in step 118, and when not in the number-of-times control mode, the time control described below is executed in step 120.

FIG. 3 shows details of the number of times control in step 118. In step 122, the count value C reset in step 114 is incremented, and in step 124, the shutter curtain is stopped for a fixed time (for example, about 1 second). By this, when an obstacle is detected, the shutter curtain is controlled so as not to descend further. In step 126, the shutter curtain is raised, and in step 128, it is determined whether or not the stop switch of the operation device 38 has been operated. When it is determined that the stop switch has been operated, the control corresponding to the stop switch is executed in step 130, and then the process proceeds to step 106.

When the stop switch is not operated, it is determined in step 132 whether or not the upper limit switch 46 is turned on to determine whether or not the shutter curtain has reached the upper limit position. When the shutter curtain has not reached the upper limit position, the process returns to step 126 to continue the upward movement of the shutter curtain, and when it is determined that the shutter curtain has reached the upper limit position, the count value C is set to a predetermined value C0 (for example, C0 in step 134). 2) Determine whether or not. When the count value C has not reached the predetermined value C0, the shutter curtain is stopped for a certain period of time in step 136, and the shutter curtain is lowered again in step 138. In step 140, it is determined whether or not the stop switch has been operated. When it is operated, the control according to the stop switch is executed in step 142, and when the stop switch is not operated, the process proceeds to step 106.

Thus, when the stop switch is operated in the ascending / descending control after the obstacle is detected, the signal from the stop switch is prioritized and the moving shutter curtain can be stopped.

When it is determined in step 134 that the count value C has reached the predetermined value C0, the number of times the obstacle has been detected has reached a predetermined value, that is, the number of times the shutter curtain has been lowered and raised has reached a predetermined value. In step 144, the electric shutter is completely stopped, and in step 146 an abnormal signal is output to the centralized control device. As a result, the control signal from the centralized control unit controls the shutter curtain so that it does not operate, and the centralized control unit is notified of the abnormality. In the next step 148, it is determined whether or not the restoration signal is input. When the restoration signal is input, the electric shutter is restored in step 150. As this restoration signal, it is possible to use the operation of the stop switch of the operation device or the operation of combining two or more operation switches.

In this number-of-times control, when the shutter curtain is operated by the operation switch during the safe operation of the shutter curtain, the count value C is stored without being reset. Therefore, the operation switch is manually operated during the repeated operation of the shutter. Repeated operation is interrupted by operation, and if the shutter curtain is lowered by a descending signal from the centralized control unit after a predetermined time and the seat plate switch is activated, the operation is repeated for the remaining number of times and then stopped at the upper limit position. It

In the above, it is determined whether or not the count value C reaches the predetermined value C0 when the upper limit position is reached. However, when the signal from the transmitter 30 is received, the count value becomes the predetermined value. It may be determined whether or not it has been determined, and the determination result may be stored and stopped at the upper limit position.

Next, the time control in step 120 will be described with reference to FIG. Since FIG. 4 is substantially the same as FIG. 3, the corresponding parts are denoted by the same reference numerals, the description thereof is omitted, and only the differences will be described. In step 138, the shutter curtain is lowered again, and at the same time when the descent is started, the timer reset in step 114 of FIG. 2 is started. In step 154, the time T counted by the timer is compared with the set time T0 (for example, 3 minutes), and when the time T becomes equal to or longer than the set time T0, the same total stop as described above is performed in step 144. This is repeated until the time T reaches the set time T0. It should be noted that this timer is started at the first passage of step 104 as described above, and is reset at steps 130 and 142 when the operation switch is operated.

As described above, according to the present embodiment, when an obstacle is detected while the shutter curtain is descending, the obstacle is detected a predetermined number of times or a predetermined time elapses from the start of the first descent. It is possible to ensure safety because it repeatedly goes up and down. When the obstacle is not removed, the shutter curtain is stopped at the upper limit position, so that when the person goes in and out, there is no human contact with the shutter curtain, which makes it easier to enter and exit, and it is easier to remove the obstacle. ..

The safety device of this embodiment can be applied to centrally controlling shutters of automatic cash teller rooms of banks and other financial institutions nationwide and shutters of entrances and exits of department stores and other large buildings.

[0027]

[Effect of the device]

 As described above, according to the inventions of claims 1 and 2, it is possible to ensure the safety at the time of unattended automatic closing of the electric shutter and at the time of remote operation, and to prevent the shutter drive motor from being damaged. The effect of, is obtained.

[Brief description of drawings]

FIG. 1 is a schematic view showing an electric shutter to which a safety device of the present invention is applied.

FIG. 2 is a flow chart showing a control routine of the safety device of the present embodiment.

3 is a flow chart showing details of step 118 of FIG.

FIG. 4 is a flow chart showing details of step 120 of FIG.

[Explanation of symbols]

 10 setting device 22 motor 26 seat plate switch 30 transmitter 34 control device

Claims (2)

[Scope of utility model registration request] 1. An obstacle detection means for detecting an obstacle which becomes an obstacle to a shutter curtain being descended, a counting means for counting the number of times the obstacle detection means has detected an obstacle, and an obstacle detection means. Control means for raising the shutter curtain to the upper limit position when an obstacle is detected and then lowering it, and stopping the shutter curtain at the upper limit position when the number of times the obstacle is detected reaches a predetermined value; Safety device. 2. An obstacle detecting means for detecting an obstacle which becomes an obstacle to a shutter curtain which is descending, a counting means for counting the number of times the obstacle detecting means has detected an obstacle, and from the first descent start. When the obstacle detection means detects an obstacle, the shutter curtain is raised to the upper limit position and then lowered, and the shutter is released when the number of times the obstacle is detected reaches a predetermined value. The number of times the curtain is stopped at the upper limit position is controlled, and when the obstacle detection unit detects an obstacle, the shutter curtain is raised to the upper limit position and then lowered, so that the elapsed time from the start of the first descent becomes a predetermined time or more. A safety device for a shutter including: a control means for selectively executing time control for stopping the shutter curtain at the upper limit position when the shutter curtain is activated.